Question

在目标数据库中创建表后，我收到以下错误。在sqlBulkCopy.WriteToServer（dtCeTask）上获取错误;

错误：给定的ColumnMapping与源或目标中的任何列都不匹配。

using (SqlCeConnection conn = new SqlCeConnection(_connectionString))
            {
                try
                {
                    conn.Open();

                    //CETASK
                    DataTable dtCeTask = new DataTable("TempTask");
                    StringBuilder sqlTask = new StringBuilder();

                    sqlTask.Append("select  StartDate,Status,Priority,Complete, PercentComplete,TimerDuration, ItemLastModified, MatterIdentifier, MatterName, TimeEntryIdentifier, Isrecurring, Originator, createdDate, DisplayName, DisplayText ");
                    sqlTask.Append("from TaskOutlookItemProxy  ");

                    using (SqlCeDataAdapter daCeTask = new SqlCeDataAdapter(sqlTask.ToString(), conn))
                    { daCeTask.Fill(dtCeTask); }

                    using (SqlConnection sqlconnection = new SqlConnection(strConnString))
                    {
                        sqlconnection.Open();

                        // create table if not exists 
                        string createTableQuery = @"Create Table TempTask1 
                        ( StartDate datetime, Status nvarchar(255), Priority nvarchar(255), Complete bit, PercentComplete int, TimerDuration int,ItemLastModified DateTime, MatterIdentifier nvarchar(255),MatterName nvarchar(255), TimeEntryIdentifier nvarchar(255),  Isrecurring bit, Originator nvarchar(255), createdDate DateTime, DisplayName nvarchar(255), DisplayText nvarchar(255) )";
                        SqlCommand command = new SqlCommand(createTableQuery, sqlconnection);
                        command.ExecuteNonQuery();



                        // Copy the DataTable to SQL Server Table using SqlBulkCopy
                        using (SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(sqlconnection))
                        {
                            sqlBulkCopy.DestinationTableName = dtCeTask.TableName;

                            foreach (var column in dtCeTask.Columns)
                            {
                                sqlBulkCopy.ColumnMappings.Add(column.ToString(), column.ToString());
                            }


                            sqlBulkCopy.WriteToServer(dtCeTask);
                        }
                    }

                }
                catch (Exception ex)
                {
                    throw (ex);
                }
            }

Answer 1

ColumnMappings区分大小写 - 这在我之前发现了（blog），我怀疑是你的情况。

在原始查询中，大多数列都在CamelCase中....除了createdDate（小写＆＃34; c＆＃34;）。所以，如果你的db表定义的列为＆＃34; CreatedDate＆＃34;，那么查询将运行正常，但是如果你的SqlBulkCopy使用了错误的列名列，那么它将失败

给定ColumnMapping不匹配

1 个答案: